diff --git a/.gitignore b/.gitignore
index bb72d15..918bd27 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 **/__pycache__/
+.tmp/
 bin/
 include/
 lib/
diff --git a/PFERD/__init__.py b/PFERD/__init__.py
index 960cc7a..989b54c 100644
--- a/PFERD/__init__.py
+++ b/PFERD/__init__.py
@@ -1,7 +1,9 @@
 from .authenticator import *
+from .organizer import *
 
 __all__ = (
-	authenticator.__all__
+	authenticator.__all__ +
+	organizer.__all__
 )
 
 LOG_FORMAT = "[%(levelname)s] %(message)s"
diff --git a/PFERD/organizer.py b/PFERD/organizer.py
new file mode 100644
index 0000000..55744eb
--- /dev/null
+++ b/PFERD/organizer.py
@@ -0,0 +1,109 @@
+import logging
+import pathlib
+import shutil
+
+__all__ = [
+	"Organizer"
+]
+logger = logging.getLogger(__name__)
+
+class Organizer:
+	def __init__(self, base_dir, sync_dir):
+		"""
+		base_dir - the .tmp directory will be created here
+		sync_dir - synced files will be moved here
+		Both are expected to be concrete pathlib paths.
+		"""
+
+		self._base_dir = base_dir
+		self._sync_dir = sync_dir
+
+		self._temp_dir = pathlib.Path(self._base_dir, ".tmp")
+		self._temp_nr = 0
+
+		# check if base/sync dir exist?
+
+		self._added_files = set()
+
+	def clean_temp_dir(self):
+		if self._temp_dir.exists():
+			shutil.rmtree(self._temp_dir)
+		self._temp_dir.mkdir(exist_ok=True)
+
+	def temp_file(self):
+		# generate the path to a new temp file in base_path/.tmp/
+		# make sure no two paths are the same
+		nr = self._temp_nr
+		self._temp_nr += 1
+		return pathlib.Path(self._temp_dir, f"{nr:08}.tmp").resolve()
+
+	def add_file(self, from_path, to_path):
+		# check if sync_dir/to_path is inside sync_dir?
+		to_path = pathlib.Path(self._sync_dir, to_path)
+		if to_path.exists():
+			logger.info(f"Overwriting {to_path}.")
+
+		# copy the file from from_path to sync_dir/to_path
+		to_path.parent.mkdir(parents=True, exist_ok=True)
+		from_path.replace(to_path)
+
+		# remember path for later reference
+		self._added_files.add(to_path.resolve())
+
+	def clean_sync_dir(self):
+		self._clean_dir(self._sync_dir, remove_parent=False)
+
+	def _clean_dir(self, path, remove_parent=True):
+		for child in path.iterdir():
+			if child.is_dir():
+				self._clean_dir(child, remove_parent=True)
+			elif child.resolve() not in self._added_files:
+				if self._prompt_yes_no(f"Delete {child}?", default=False):
+					logger.debug(f"Deleting {child.resolve()}")
+					child.unlink()
+
+		if remove_parent:
+			try:
+				path.rmdir()
+			except OSError: # directory not empty
+				pass
+
+	def _prompt_yes_no(self, question, default=None):
+		if default is True:
+			prompt = "[Y/n]"
+		elif default is False:
+			prompt = "[y/N]"
+		else:
+			prompt = "[y/n]"
+
+		text = f"{question} {prompt} "
+		wrong_reply = "Please reply with 'yes'/'y' or 'no'/'n'."
+
+		while True:
+			response = input(text).strip().lower()
+			if response in {"yes", "ye", "y"}:
+				return True
+			elif response in {"no", "n"}:
+				return False
+			elif response == "":
+				if default is None:
+					print(wrong_reply)
+				else:
+					return default
+			else:
+				print(wrong_reply)
+
+# How to use:
+#
+# 1. Before downloading any files
+# orga = Organizer("/home/user/sync/", "/home/user/sync/bookstore/")
+# orga.clean_temp_dir()
+#
+# 2. Downloading a file
+# tempfile = orga.temp_file()
+# download_something_to(tempfile)
+# orga.add_file(tempfile, "books/douglas_adams/hhgttg"
+#
+# 3. After downloading all files
+# orga.clean_sync_dir()
+# orga.clean_temp_dir()
diff --git a/test.py b/test.py
index 4c40bb6..ec5bd75 100644
--- a/test.py
+++ b/test.py
@@ -1,6 +1,7 @@
 import PFERD
 import asyncio
 import logging
+import pathlib
 import os
 import sys
 
@@ -8,13 +9,23 @@ logging.basicConfig(level=logging.DEBUG, format=PFERD.LOG_FORMAT)
 #logging.basicConfig(level=logging.INFO, format=PFERD.LOG_FORMAT)
 
 async def test_download():
+	base_path = pathlib.Path(".")
+	sync_path = pathlib.Path(base_path, "synctest")
+
+	orga = PFERD.Organizer(base_path, sync_path)
 	auth = PFERD.ShibbolethAuthenticator(cookie_path="cookie_jar")
-	soup = await auth.get_webpage("885157")
+	#soup = await auth.get_webpage("885157")
+
+	orga.clean_temp_dir()
+
+	filename = orga.temp_file()
+	print(filename)
+	await auth.download_file("file_886544_download", filename)
+	orga.add_file(filename, pathlib.Path("test.pdf"))
+	
+	orga.clean_sync_dir()
+	orga.clean_temp_dir()
 	await auth.close()
-	if soup:
-		print("Soup acquired!")
-	else:
-		print("No soup acquired :(")
 
 def main():
 	#print(f"  os.getcwd(): {os.getcwd()}")